Path Loss Prediction in Wireless Communication System Using Fuzzy Logic

Abstract

The portable wireless technology with wide accessibility facilitates the people to enter into a new dynamic environment for optimizing the overall productivity. Establishing reliable communication is a challenging aspect, because the signal propagation is heavily subjected to interference and fading effects resulting in severe path loss. In the field of telecommunication system, the effect of Path Loss in the signal is used to analyze and design the link budget system. Previously, many path loss prediction models like HATA, and Okumura are proposed where the path loss is determined with the help of experimental field values and verified with the help of the model graph. In this work, BPSK modulated signal is used to determine the path loss using HATA empirical formula derived with the help of the Okumura curve for various urban, suburban and rural areas. The identified values are given to triangular membership function and defuzzification is performed using faster and flexible center of sum method. The inferred results show maximum loss in case of urban and increases at an average rate of 10dB per decade with distance. The proposed technique optimizes signal transmission by determining the path loss accurately.